Folding box



D. LEVKOFF FOLDING BOX March 3, 1942.

2 Sheets-Sheet 1 Filed May 18, 1940 04x00 Ale-W405? INVENT OR.

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I ATTOZP/VZQ/JI D. LEVKOFF FOLDING BOX March 3, 1942.

Filed May 18, 1940 2 Sheets-Sheet-Z FIG. 5.

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.424 12/0 1 V/(OFF.

INVENTOR.

ATTOfi/VAVSZ Patented Mar. 3, 1942 ouns-o STATES PATENT OFFICE FOLDINGBOX David Levkoff, Brooklyn, N. Y. Application May 18, 1940, Serial No.335,905

4 Claims.

This invention relates to folding boxes of the knock-down, set-up type.

The primary object of the invention resides in a collapsible cardboardbox which is cut from a a collapsible four sided box which isconstructed of a single blank of cardboard in which the side walls ofthe box are formed from portions of the blank inwardly of the confiningedges thereof, whereby a saving of stock is obtained over such boxblanks which have their side walls projecting from the body portion ofthe blank.

A further feature of the invention is the provision of a collapsiblecardboard box which is rigid when set up for use, and in which the flapsfor locking the box in set up position also serve to reinforce theopposed end walls.

Other novel features of the invention will become apparent as thefollowing specification is read in conjunction with the accompanyingdrawings, in which:.

Figure 1 is a plan view of an inner side of the blank from which oneform of the invention is constructed.

Figure 2 is a top plan view of the box in collapsed condition.

Figure 3 is a perspective view of the box in partially erected position.

Figure 4 is a perspective view of the box in set up position for use.

Figure 5 is a vertical sectional view on the line 55 of Figure 4.

Figure 6 is a vertical sectional view on the line 8-45 of Figure 4.

Figure '7 is a plan .view of the blank from which a modified form of boxis constructed.

Figure 8 is a top plan view of the modified form of box in collapsedcondition.

Figure 9 is a perspective view of the modified form of box in fullyerected position for use.

Figure 10 is a vertical sectional view on the line l|l||i of Figure 9.

Figure 11 is a vertical sectional view on the line of Figure 9.

Referring to the form of the invention illustrated in Figures 1 to 6inclusive, and at present to Figure l, the letter A designates asubstantially rectangular shaped blank of foldable cardboard which isscored longitudinally on the score line i0 approximately midway of itswidth to divide the blank into two foldable sections B and C, and on ascore line H inwardly of one of thelongitudinal edges to provide asection D which has glue l2 applied to the inner side thereof. The blankA is scored transversely on the parallel score lines I3, l4, l5 and I6,which together with the score line i0, divides the section B into abottom wall ll, outer end walls iii-l8, and locking The sections B and Dmay be termed end sections of the blank which section C may be termed anintermediate section of the blank. The score lines l0, II, and I 4define. one auxiliary end wall 20, while a second auxiliary end wall 20is bounded by the score lines III, II, and I5. That portion of thesection C-between the auxiliary end walls 202|l is severed by a slit orslot 2| which extends entirely thereacross and terminates substantiallymidway the height of the auxiliary end walls 2020. The slit or slot 2|divides a portion of the section 0 into a pair of side walls 22-22, oneof which is bounded by the score lines l0, l4, and I5, and the other bythe score lines I I, I4, and IS. The width of the slot 2| predeterminesthe height of the side walls, the maximum identical height of both sidewalls being formed by a slit instead of a slot. The ends of the slit orslot 2| extend into the auxiliary end walls 20-2ll and are joined byfour diagonal score lines 23 which extend to the four bottom corners ofthe side walls 22-22. The diagonal score lines 23 are disposed at asubstantially forty-five degree angle relatlveto the score lines withwhich they connect, and in this instance the walls adjacent the ends ofthe slot 2| are curved so as to meet with the score lines 23. The scorelines 23 divide each inner end wall into a substantially triangularshape folding web section 24.

To effect a folding of the blank A for gluing, the same is folded on thescore line l0- so that the sectiton C overlies one side of the sectionB, whereupon the section or glue flap D is folded on the score line tolie against and adhere to the other side of the section B as clearlyillustrated in Figure 2 of the drawings. The box may now be said to bein collapsed position for all walls are fiat and the collapsed boxes maybe stacked for compact shipping and storage purposes.

To set up the box for use from the collapsed position illustrated inFigure 2, the operator with both hands, grasps the respective side walls22 and pulls outwardly thereon which causes the respective side walls tohinge on the lines I 0 andl l, and simultaneously effects a breaking ofthe webs 24 on the diagonal score line 23 which permits the inner endwalls 20-20 and outer end walls |B-|8 to move to upstanding position byhinging on the respective score lines I4 and i5. As the side walls,auxiliary and outer end walls move into erect position, the webs 24 foldupon and assume a fiat position against the auxiliary end walls,whereupon the flaps |9-|9 may be manually folded inwardly on the scorelines l4 and Hi to a position fiat against the auxiliary end walls 2020and folded webs 24. The flaps l9 may be cut to a size which requiresthat they be forcibly wedged into engagement with the side and bottomwalls of the box whereby they may be frictionally held, or as shown inthe drawing, the bottom edges of the flaps |9 may have projectingtongues 25 which enter respective slots 26 in the bottom wall H in linewith the score lines I4 and I5. The box is now in complete set upposition as illustrated in Figures 4 to 6 inclusive, and

any conventional form of cardboard cover of the slip-on type may beapplied over the open top thereof.

In Figures 1 to 6 inclusive, the glue seam is disposed along the bottomwall I! of the box, but it is possible to construct a folding box whichperforms the same function by positioning the glue seam centrally acrossthe bottom as illustrated in Figures 7 to 11 inclusive, and this form ofthe invention will now be fully described.

In the form of the invention illustrated in Figures 7 to 11 inclusive,the letter A designates the substantially rectangular blank of cardboardfrom which the folding box is constructed and which is scoredlongitudinally on the parallel score lines l|l-| which divides the blankinto end sections B and D' and an intermediate sec tion C. The blank A.is scored transversely on the parallel score lines l3, l4, I5, and I6,which with the score line I ll and H divide the end sections B and Dinto bottom wall section H'- H, outer end wall sections |8|8', and apair of locking flap sections |9-|9. The combined width of the sectionsB'D is greater than the width of the section so that when the box isinitially folded for glueing, the sections 13' and D overlap, and theinner side of the overlapping portion of the section D is provided withglue l2.

Formed from the section C is a pair of auxiliary end walls 2|l-20', oneof the end walls 20 being bounded by the score lines I0, I and I4, andby an edge of the blank, While the other end wall 20' is bounded by thescore lines ID, and I6. That portion between the auxiliary end wallsections 2|l20' is severed by a slit or slot 2| which extends entirelythereacross, and terminates substantially midway of the height of theauxiliary end wall sections 2|l'20. The slit or slot 2| divides aportion of the section 0' into a pair of side wall sections 221-22. Theends of the slit or slot 2| which extend into the end walls 20 arejoined by four diagonal score lines 23 which extend to the four bottomcorners of the side walls 2222. The diagonal score lines 23' aredisposed at a substantially forty-five degree angle relative to theintersecting score lines with which they connect. Each inner end Wallsection 20 is provided with a pair of the diagonal score lines 23 whichdivide each end wall section 20 into a pair of substantially triangularshape folding web sections 24.

So far, I have only described a pair of coacting flap sections |9'-|9which. fold inwardly over one of the auxiliary end walls 20, and ifdesired, a similar pair of flap sections |9--|9' may be arranged forlike folding over the other auxiliary end wall 20'. However, by formingthe second inwardly folding flap l9" coextensive with the other innerend wall section 20, I am able to cut the blank A from stock without anyloss, except that portion of the blank which is removed to form the slot2|, but if only a slit is formed instead of a slot there is no loss ofstock. The flap I9" is taken from that end of an adjacent blankI 9Awhich is cut to form the flap sections To effect a folding of the blankA for glueing, the same is folded on the score lines ||l-| I so that thesections B and D overlap with the glue side l2 of the section Doverlapping the adjacent portion of the section B as illustrated inFigure 8 of the drawing. When in this position the box is in collapsedposition and may be set up by manually grasping the side walls 22'-22'and pulling outwardly thereon which si multaneously moves the inner andouter end walls to erect position, during which time the webs 24' foldflat against the auxiliary end walls 20-2|l'. The flap sections |9|9having been fixedly connected by the glueing operation, they form asingle flap which with the flap l9" are folded inwardly and downwardlyagainst the inner end walls and folded webs 24'. In this form the flapsI9 and I9" have a tight frictional wedge fit between their free edgesand adjacent Walls ofthe box as illustrated in Figures 9 to 11inclusive. Articles packed in the box when in set up position will actto prevent any tendency of the flaps l9-|9 from accidentally unfolding.

In the preceding specification, I have referred to a four sided boxwhich may be square, or rectangular in configuration, and to distinguishthe opposed upstanding walls of the box. I have referred to a pair ofopposed walls as being side walls, and the other pair as being endwalls. However, all of the upstanding walls may be referred to as sidewalls if desired, and any interpretation of the appended claims shouldbe so construed.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent of the United States, is:

1. A folding rectangular cardboard box blank including a rectangularpanel forming at least a portion of the bottom wall, a rectangularonepiece panel integral with the bottom wall panel and of a widthsubstantially equal to that of the bottom wall and of a length equal tothe combined length of the bottom and end walls of the box formed bysaid blank, said one-piece panel having transverse fold lines adjacenteach end defining an intermediate side wall forming panel and auxiliaryend wall panels, said one-piece panel further having a longitudinalmedial slot extending entirely across the side wall forming panel andseparating the same into separate side wall panels, said slot extendinginto the auxiliary end wall panels with its ends terminating in theauxiliary end wall panels substantially midway of the height thereof,the edges of the slot along the side wall forming panel forming the topedges of the side wall panels and the bottom edges of the side wallpanels lying along the outer edges of the said one piece panel, diagonalhinge scores extending from the bottom corners of the side wall panelsto the respective adjacentv terminal ends of the slot and being disposedat a substantially forty-five degree angle relative to the bottom edgesof the adjacent side wall panels to provide folding corner webs, and endwall panels integrally connected to the respective auxiliary end wallpanels along hinge scores for folding inwardly against the respectiveauxiliary end wall panels when the blank is folded to erected boxforming position. v

2. A folding rectangular carboard box blan including a rectangularbottom wall panel, a rectangular one-piece panel integral with thebottom wall panel and having one of its sides connected thereto along ahinge score, a glue flap connected to the other opposite side of theonepiece panel, said one-piece panel being of a width substantiallyequal to that of the bottom wall panel and of a length equal to thecombined length or the bottom wall panel and end 'walls of the boxformed by said blank, said one-piece panel having transverse fold linesadjacent each end defining an intermediate side wall forming panel andauxiliary end wall panels, said onepiece panel further having alongitudinal medial slot extending entirely across the side wall formingpanel and separating the same into separate side wall panels, said slotextending into the auxiliary end wall panels with its ends terminatingin the auxiliary end wall panels substantially midway of the heightthereof, the edges of the slot along the side wall forming panel formingthe top edges of the side wall panels and the bottom edges of the sidewall panels lying along the 3. A folding cardboard box blank as setforth in claim 2, including locking flap panels connected to therespective end wall panels along hinge scores and being .foldableinwardly against the respective auxiliary end wall panels for securingthe folded blank in box forming position for use.

4. A folding rectangular cardboard box blank including a pair ofrectangular panel sections which combined form a rectangular bottomwall,

a rectangular one-piece panel integral with the bottom wall panels andof a width substantially equal to that of the bottom wall and of alength equal to the combined length of the bottom and end walls of thebox formed by said blank, said 'one-piece panel having transverse foldlines adjacent each end defining an intermediate side wall forming paneland auxiliary end wall panels, said one-piece panel further having alongitudinal medial slot extending entirely across the side wall formingpanel and separating the same into separate side wall panels, said slotextending into the auxiliary end wall panels with its ends terminatingin the auxiliary end wall panels substantially midway of the heightthereof, the edges of the slot along the side wall forming panel formingthe top edges of the side wall panels and the bottom edges of the sidewall panels lying along the outer edges of the said one-piece panel,diagonal hinge scores extending from the bottom corners of the side wallpanels to the respective adjacent terminal ends of the slot and beingdisposed at a substantially forty-five degree angle relative to thebottom edges of the adjacent side wall panels to provide folding cornerwebs, and end wall locking panels integrally connected to the respectiveend wall panels along hinge scoresg DAVID LEVKOFF.

